The internet firm has written to companies that sell essays and dissertations online informing them of the ban, which is due to come into force next month.
The move was immediately welcomed by universities, which are keen to root out student cheats.
Prof Drummond Bone, the president of Universities UK (UUK), which represents vice-chancellors, said: "Making life harder for these cynical web 'essay mills' is a step in the right direction."







